* {
    margin: 5px;
    border-radius: 10px;
    box-sizing: border-box;
}

html, body {
    display: flex;
    height: 100%;
    width: 100%;
    margin: 0px;
    overflow: hidden;
}

button, input, textarea, select {
    outline: none;
}

input[type=file] {
    margin: 0px 0px -100% 0px;
    opacity: 0;
    float: left;
}